續一切經音義 6.29

6.29

踰繕那（上羊朱反。繕音善。梵語也。古云由旬。或云由延。或云踰闍那。皆訛略也。案西域記云。踰繕那者。自古聖王軍行程也。舊傳一踰繕那四十里。印度國俗乃三十里。聖教所載唯十六里。考其異端各有所據。或取聖王行時或取肘量或取古尺終是軍行一日程也。今冝依西域記三十里為定。蓋玄奘法師親考遠近撰此行記奉對太宗皇帝所問實以憑焉。此並依慧琳法師及慈恩音訓釋）。

Yojana (踰繕那: the first character has the fanqie *y- / zh-*; shan 繕 is pronounced shan 善; this is Sanskrit; formerly rendered youxun 由旬, or youyan 由延, or yuzhena 踰闍那, which are all corrupt abbreviations. According to the Record of the Western Regions: "A yojana has been, since ancient times, the day's march of a sacred king's army. The old tradition held that one yojana is forty li. The common custom in India is thirty li. What is recorded in the sacred teachings is only sixteen li. When examining these differing accounts, each has its basis: some take the time of a sacred king's march, some take measurements in cubits, and some take ancient feet; ultimately it is one day's march for an army." Now one should properly follow the Record of the Western Regions, fixing it at thirty li. For Master Xuanzang personally investigated the distances and compiled this travel record in response to the inquiries of Emperor Taizong, so it can truly be relied upon. This is all explained according to the glosses of Master Huilin and Master Ci'en).